/*
 * Copyright (C) 2010 Dag Rende
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package se.rende.myrss.data;

import android.content.Context;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;

/**
 * Definies the SQLite database.
 *
 * @author Dag Rende
 */
public class MyRSSDataHelper extends SQLiteOpenHelper {
	private static final String DATABASE_NAME = "myrss.db";
	private static final int DATABASE_VERSION = 3;

	public MyRSSDataHelper(Context context) {
		super(context, DATABASE_NAME, null, DATABASE_VERSION);
	}

	@Override
	public void onCreate(SQLiteDatabase db) {
		db.execSQL("create table channel (" +
				"_id integer primary key autoincrement," +
				",name text" +
				",url text" +
				",is_group integer" +	// boolean
				");");
		db.execSQL("create table item (" +
				"_id integer primary key autoincrement" +
				",channel integer" +
				",title text" +
				",description text" +
				",link text" +
				",quid text" +
				",pub_date integer" +
				",creator text" +
				",seen integer" +	// boolean
				",star integer" +	// boolean
				");");
	}

	@Override
	public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
		if (oldVersion != newVersion) {
			for (int i = oldVersion; i < newVersion; i++) {
				switch (i) {
				case 1:
					db.execSQL("alter table item add column seen integer");
					db.execSQL("alter table item add column star integer");
					break;
				case 2:
					db.execSQL("alter table channel add column url text");
					db.execSQL("alter table channel add column is_group integer");
					db.execSQL("alter table item add column channel integer");
					db.execSQL("create table group_channel_channel (" +
							"group_channel integer" +
							",channel integer" +
							",is_group integer" +
							")");
					db.execSQL("delete from item");
					break;
				case 3:
					break;
				default:
					break;
				}
			}
		}
	}

}
